Its result has to be colibrated. Because the structure of organic substances is complicated, the number of oxidation valence of carbon is assumed zero when calculating organic carbon.

重铬酸钾—硫酸亚铁法主要难题是在计算时无法知道沉积物中有机碳的氧化数，因而所测值不够准确。

youdao

We'll get to oxidation number in the second half of this course, but it's not in any way the same idea as formal charge.

我们会在课程的后半部分讲到氧化数，但它和形式电荷完全不是同一个概念。

youdao

The number of hydrocarbon oxidation bacteria had a relationship with the supply of nutrients as well as other water factors.

烃类氧化菌的数量与水域中的营养盐含量及其它水质因子有一定的关系。

youdao

We'll get to oxidation number in the second half of this course, but it's not in any way the same idea as formal charge.

我们会在课程的后半部分讲到氧化数，但它和形式电荷完全不是同一个概念。

麻省理工公开课 - 化学原理课程节选